Significant Accounting Policies (Narrative) (Details)	6 Months Ended
	Jun. 27, 2020
Accounting Policies [Abstract]
Operating Cycle	371 days
Operating cycle of company	The fiscal year of the Company consists of a 52- or 53-week period ending on the Saturday closest to December 31. Fiscal year 2020 is a 53-week period ending on January 2, 2021, with quarterly periods ending on March 28, June 27 and September 26, 2020. Fiscal year 2019 was a 52-week period ending on December 28, 2019, with quarterly periods ending on March 30, June 29 and September 28, 2019.